滑移爆轰载荷作用下复板承受的冲击压力的数值计算  

NUMERICAL ANALYSIS OF IMPACT PRESSURE ON UPSET PLATE UNDER MOTION DETONATION LOAD

作　　者：谢飞鸿[1] 罗冠炜[2] 孙伟[1] 廖军生[2] 

机构地区：[1]兰州交通大学土木工程学院,兰州730070 [2]兰州交通大学机电工程学院,兰州730070

出　　处：《振动与冲击》2008年第7期58-62,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(10572055);(50475109)

摘　　要：爆炸载荷作用下复板运动规律的研究对于炸药爆炸所产生的冲击压力在复板上的时程分布的数值计算是十分重要的,以普朗特-梅耶(Prandtl-Meyer)的绕流理论来描述爆炸产物的侧向飞散过程,而且在炸药滑移爆轰作用下复板的弯曲对爆炸产物的稀疏作用也可以用普朗特—梅耶(Prandtl-Meyer)的绕流理论来描述,也就是采用爆炸产物的侧向飞散(P-M)和复板弯曲的稀疏作用(P-M)两种运动的综合数学推演来比较准确的表达爆炸产物的真实运动状态,进而推导出了描述复板运动规律的近似计算方法—twin P-M法。通过实例计算分析,表明这一方法能较有效地计算炸药所产生的时程爆轰压力在复板上的分布状态和复板的运动规律,为爆炸焊接参数计算提供比较精确的计算参数依据。The real motion of explosive detonation product was expressed more exactly as the synthesis of lateral dispersion process of product and sparstity action due to bending of upset plate, both of which can be described by use of Prandtl-Meyer circumferential motion model. Then, an approximate numerical method, namely, twin P-M method, was deduced to analyse the motion of upset plate. The results of practical examples show that the method can be used to calculate accurately the time history of detonation pressure and its distribution on the upset plate. The results provide an effective means for determining more precisely the explosive welding parameters.

关 键 词：爆炸焊接 滑移爆轰 冲击荷载 TWIN P-M模型 时程压力 

分 类 号：O381[理学—流体力学]